Improvement in stop-mechanisms in looms



w. EDSON.

Stop-Mechanisms in Looms.

Patented June 3. 187

AM PHDTO-UTHOGHAPHIG a). NY. (aseamzls PRU c5351) UNITED STATES WILLIAMEDSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE AMERI-y PATENT OFFICE.

CAN STOP-MOTION COMPANY, OF SAME PLACE.

IMPROVEMENT IN STOP-MECHANISMS IN LOOM S.

Specification forming part of Letters Patent No. 139,560, dated June 3,1373; application filed April 30, 1873.

To all whom it may concern:

Be it known that 1, WILLIAM EDsoN, of Boston, in the county of Suffolkand State of Massachusetts, have invented an Improved Detecter-Gruardfor Looms, of which the following is a specification This inventionapplies to drop-box looms, provided with weft-detecters, in whichthereis a liability of the weft-threads (which are already incorporated inthe cloth and are still connected, direct from the nearest selvage tothe shuttle) fallin g back upon the lay and so engaging with thedetecter as to interfere with its action. The object of this inventionis to prevent this falling back of the threads.

Figure 1 is a perspective view ofa part of the lay of a loom showing myinvention, and an ordinary detector, looking from the front of the loom.Fig. 2 is a view of the same, looking from the back of the loom. Fig. 3is across-section through the guard. Figs. 4, 5,-

and '6 serve to illustrate the action of the weft-thread in relation tothe detecter and guard.

A represents the lay of a loom and O a comb-weft detecter made in any ofthe desirable ways. C is an arm extending from the shuttle-box towardthe center of the lay, and attached directly to the shuttle-box or tothe end of the lay by any suitable device. To the end of this arm, andextending below it, I attach the guard-piece E, Figs. 1, 2, and 3, madeto act as a supplement to the lower guard-piece l) also, fastened to thelay, the two pieces E and 1) being placed so as not to touch each other,but yet to act in conjunction to allow of the free passage of theweftthread, when it approaches it from the direction indicated by thearrows T and U; but

to. resist the thread when it approaches from the direction indicated bythe arrow V, Figs. 1 and 2. To accomplish this result the guard pieces Eand D may be made in a great variety of forms, it being necessary onlythat they bear a certain co-relat-ion to each other,

as shown. r

The oflice of the guard'may be explained as follows: If we suppose thelay to be retreating, as in Fig 4, then the beaten-up thread R,extending from the shuttle M to the selvage i of the cloth P, must passthrough the guard,

' which it will be free to do, as can be seen by inspection of Figs. 1,2, and 3. If we sup pose the lay, Fig. 5, to be beating up, the

thread R having passed the guard at the previous retreating stroke, andthe thread S, if not broken, resting across the detecter, then the guardperforms its office of preventing the thread R from falling back ontothe detecter 'D, or their equivalents, arranged to operate inconjunction with the lay, substantially as described, and for thepurpose set forth.

WILLIAM EDSON.

Witnesses: p

FRANK G. PARKER, JOHN J. HALEY.-

